地理研究

地理研究 ›› 1998, Vol. 17 ›› Issue (3): 297-302.doi: 10.11821/yj1998030011

• 论文 • 上一篇    下一篇

岱海湖泊沉积物频率磁化率对历史时期环境变化的反映*

张振克, 吴瑞金, 王苏民   

  1. 中国科学院南京地理与湖泊研究所湖泊沉积与环境开放研究实验室 南京 210008
  • 收稿日期:1997-08-18 修回日期:1998-06-25 出版日期:1998-09-15 发布日期:1998-09-15
  • 作者简介:张振克, 男, 1963年10月生。副教授, 博士生, 主要从事海岸地貌与环境、湖泊沉积环境方面的研究。发表“烟台附近海岸风沙地貌的初步研究”、“芝罘连岛沙坝北端封闭泻湖成因与发育过程”、“全新世中期洱海湖泊沉积记录的环境演化与西南季风变迁”等论文30余篇。
  • 基金资助:
    * 国家自然科学基金,中国科学院湖沼专项资助

IMPLICATION OF MAGNETIC FREQUENCY DEPENDENT SUSCEPTIBILITY ON ENVIRONMENTAL VARIATION FROM LACUSTRINE SEDIMENT IN DAIHAI LAKE

Zhang Zhenke, Wu Ruijin, Wang Sumin   

  1. Lake Sediment and Environment Laboratory, Nanjing Institute of Geography and Limnology, Chinese Academy of Science, Nanjing 210008
  • Received:1997-08-18 Revised:1998-06-25 Online:1998-09-15 Published:1998-09-15

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摘要： 在探讨封闭湖泊沉积物频率磁化率的环境意义的基础上,根据岱海DH32孔湖泊沉积物磁化率的测量结果,结合粒度、孢粉、历史资料和硅藻分析结果,对岱海历史时期的环境变化进行了探讨。研究认为:历史时期内陆封闭湖泊沉积物频率磁化率高值段指示气候偏湿阶段;低值段指示气候干旱阶段;DH32孔湖泊沉积物频率磁化率反映的近300年来岱海气候变化可划分七个阶段,并与粒度、孢粉、硅藻和历史资料的分析结果基本一致。湖泊沉积物频率磁化率是恢复历史时期环境变化的重要环境指标之一。

关键词: 岱海, 湖泊沉积物, 频率磁化率, 环境变化

Abstract: On the basis of discissing the environmental significance of magnetic susceptibility of lake sediment, the historical environmental variations have been studied from Daihai DH32 Core with the analysis of granulomtry, sporo-pollen, historical data and diatom determination. It is believed that during the historical periods the higher value of magnetic frequency dependent susceptibility in lake sediments coincided with the wet climate, and the lower value related with the dry climate. The climate change in the past 300 years implicated by magnetic frequency dependent susceptibility from DH32 Core can be divided into seven periods which mostly coresponded with the analysis of granulomtry, sporo-pollen, historical data and diatom determination. The magnetic frequency dependent susceptibility of lacustrine sediment is one of the main environmental indexes for reconstructing historical environmental variations.

Key words: Daihai lake, lacustrine sediment, magnetic frequency dependent susceptibility, environmental variations

PACS: 

  • K928.43